{"paper":{"title":"The role of grain dynamics in determining the onset of sediment transport","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Abram H. Clark, Corey S. O'Hern, Mark D. Shattuck, Nicholas T. Ouellette","submitted_at":"2016-02-24T16:04:23Z","abstract_excerpt":"Sediment transport occurs when the nondimensional fluid shear stress $\\Theta$ at the bed surface exceeds a minimum value $\\Theta_c$. A large collection of data, known as the Shields curve, shows that $\\Theta_c$ is primarily a function of the shear Reynolds number ${\\rm{Re}}_*$. It is commonly assumed that $\\Theta>\\Theta_c({\\rm{Re}}_*)$ occurs when the ${\\rm Re}_*$-dependent fluid forces are too large to maintain static equilibrium for a typical surface grain. A complimentary approach, which remains relatively unexplored, is to identify $\\Theta_c({\\rm{Re}}_*)$ as the applied shear stress at whi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.07571","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}